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File aggregation in a switched file system

a file system and file system technology, applied in the field of network file management, can solve problems such as the limitation of communication of certain client devices

Inactive Publication Date: 2012-06-05
RPX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Certain client devices may be limited to communication with certain file servers, e.g., based on network file protocol or application.

Method used

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  • File aggregation in a switched file system
  • File aggregation in a switched file system
  • File aggregation in a switched file system

Examples

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Embodiment Construction

[0038]Definitions. As used in this description and related claims, the following terms shall have the meanings indicated, unless the context otherwise requires:

[0039]Aggregator. An “aggregator” is a file switch that performs the function of directory, data or namespace aggregation of a client data file over a file array.

[0040]Data Stream. A “data stream” is a segment of a stripe-mirror instance of a user file. If a data file has no spillover, the first data stream is the stripe-mirror instance of the data file. But if a data file has spillovers, the stripe-mirror instance consists of multiple data streams, each data stream having metadata containing a pointer pointing to the next data stream. The metadata file for a user file contains an array of pointers pointing to a descriptor of each stripe-mirror instance; and the descriptor of each stripe-mirror instance in turn contains a pointer pointing to the first element of an array of data streams.

[0041]File Array. A “file array” consis...

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Abstract

In a switched file system, a file switching device is logically positioned between clients and file servers and communicates with the clients and the file servers using standard network file protocols. The file switching device appears as a server to the client devices and as a client to the file servers. The file switching device aggregates storage from multiple file servers into a global filesystem and presents a global namespace to the client devices. The file switching device typically supports a “native” mode for integrating legacy files into the global namespace and an “extended” mode for actively managing files across one or more file servers. Typically, native-mode files may be accessed directly or indirectly via the file switching device, while extended-mode files may be accessed only through the file switching device. The file switching device may manage file storage using various types of rules, e.g., for managing multiple storage tiers or for applying different types of encoding schemes to files. Rules may be applied to pre-existing files.

Description

CROSS REFERENCE TO RELATED APPLICTIONS[0001]This patent application is a continuation-in-part of, and therefore claims priority from, U.S. patent application Ser. No. 10 / 043,413 entitled FILE SWITCH AND SWITCHED FILE SYSTEM filed Jan. 10, 2002, now issued as U.S. Pat. No. 7,562,110, which claims priority from U.S. Provisional Patent Application No. 60 / 261,153 entitled FILE SWITCH AND SWITCHED FILE SYSTEM filed Jan. 11, 2001.[0002]This patent application is also a continuation-in-part of, and therefore claims priority from, U.S. patent application Ser. No. 10 / 336,832 entitled RULE BASED AGGREGATION OF FILES AND TRANSACTIONS IN A SWITCHED FILE SYSTEM filed Jan. 2, 2003, now issued as U.S. Pat. No. 7,512,673, which is a continuation-in-part of U.S. patent application Ser. No. 10 / 043,413 entitled FILE SWITCH AND SWITCHED FILE SYSTEM filed Jan. 10, 2002, now issued as U.S. Pat. No. 7,562,110, which claims priority from U.S. Provisional Patent Application No. 60 / 261,153 entitled FILE SWIT...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06F13/00
CPCG06F11/1076G06F17/30194G06F11/1446G06F11/2056G06F2201/84G06F2201/86G06F2211/1028H04L67/1097H04L67/28H04L67/2838H04L69/329G06F16/182H04L67/56H04L67/567
Inventor LACAPRA, FRANCESCODUVVURI, SRINIVAS P.MILOUSHEV, VLADIMIR I.NIKOLOVA, LEGAL REPRESENTATIVE, KRASIMIRANICKOLOV, PETER A.
Owner RPX CORP
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